Larry Manetti claims to have met the ghost of a waitress, who served the cast, on the night she was murdered while staying in a hotel on location during the filming of this movie.
This is the second film in which Dale Robertson portrayed FBI Agent Melvin Purvis. He also played him in "Melvin Purvis: G-Man". Additionally, Harris Yulin, who portrays Kansas City mobster Johnny Lazia in this film, portrayed bank robber "Machine Gun" Kelly in that film.
Lynn Loring's final film.